Gustavus adolphus john sghott



(No Model.)

G.A .J,.SGHOTT. LOOM FOR WEAVING GUT PILB FABRICS.

No. 4993174. PatentefdJune 13, 1893.

WT/M55365.

UNITED STATES PATENT OFF CE.

GUSTAVUS ADOLPHUS JOHN SOHOTT, OF BRADFORD, ENGLAND.

LOOM FOR WEAVING CUT PILE FABRICS.

3PECIFICATION forming part of Letters Patent No. 499,474, dated June 13, 1893.

Application filed January 26, 1891. Serial No. 379,030. (No model.) Patented in England January 14, 1889, N0- 655.

To all whom it may concern.-

Be it known that I, GUSTAVUS ADOLPHUS JOHN SCHOTT, manufacturer, a subject of the Queen of Great Britain and Ireland, residing I at Bradford, in the county of York, England, have invented certain Improvements in Looms.

for Weaving Out Pile Fabrics, (for which I have obtained Letters Patent in Great Britain, No. 655, dated January 14, 1889,) of which the following is a specification.

My invention relates to an improvement upon my former invention for which I obtained a patent on the 8th day of December, 1891, No. 464,7 34. In such patented invention I cut each pick of pile weft, as it was being beaten up. Wires, or thin steel knives were attached by one end to a bar and by the other end to the harness, and were pushed toward the reed at the times when the reed would be beaten up. In my present invention, I improve the knives and the method of attaching them to the harness, and of spacing the knives in the knife-bar, and I also provide improved means for actuating the knife-bar.

I will describe my invention with reference to the accompanying drawings:

Figure 1 represents one of the improved knives, with its attachments. Figs. 2 and 3 are respectively front and back end views of the same. Fig. 4 represents a modification in the formation of the knife. Figs. 5 and 6 illustrate the formation of spacing washers, for application to, or between, the front ends of the knives. Fig. 7 illustrates the formation of a harness attachment, for the rear end of a knife. Fig. 8 shows how the knives are applied and worked. Figs. 9 and 10 represent a construction for supporting the ends of the knife bar. Fig. 11 illustrates a modification.

In the drawings, parts which appear in the drawings accompanying my said former invention,in the same or in an improved form, are marked with the same letters of. referonce.

The knife A represented in Fig. 1, is made of very thin sheet steel, as in my former invention, a being the cutting part and a the, so termed, wire which passes through the reed. I now make the end a which is held by the knife bar, in the form of part of a circle. that the knife bar is composed of two parts,

On referring to Fig. 8, it will be seenthebar proper c, and a cap-bar c, which is Fig. 8, the knives are held by the bar, at the same time the end d of each knife can be raised and lowered, the knife moving partly around the center of the channel in the compound bar 0 c, as upon a hinge. The knives have to be spaced at a little distance apart,

so as to allow the warp threads to pass freely betweenthe knives. This spacing I effect by securing to the end a of each knife a dished washer 01 made of thin sheet-metal. Such a washer is represented in Fig. 6. The washer may be riveted or secured to the flat side of the round end a in any suitable manner. In practice I punch a hole 0, in the center of the part a and I form a hollow projecting pap d upon one side of the washer, similar to an ordinary metal eyelet. The pap is inserted in the hole a andis riveted or flanged over in the same manner as when securing an eyelet. When I require wide spaces, as when weaving coarse fabrics, I sometimes attach two washers together, as indicated in Fig. 5, and interpose pairs of the united washers between the knife ends. I hinge the back end a. to a hinging piece 6 made of thin sheet metal. A blank, somewhat in the form represented by Fig. 7, is punched outof the sheet metal, and is perforated. The two wings I) are then bent upward, and toward each other, so as to form jaws, into which the end a of the'knife enters. Aneyelet passed into the holes 19 and into a hole formed in a and clenched in the ordinary manner secures the parts together. The end a is not tightly fixed in the jaws in the hinging piece, but is free to turn as upon a hinge. The yarns fifof the heald or harness are passed through the holes 19 in the hinging piece. of the loom the ends a of the knives are raised and lowered as indicated in Fig. 8 inwhich the lay 'g is represented in its backward position ready for the passage of the shuttle, which for a pile pick would pass over the Duringthe working 1 lower knives and below the upper knives. As the pile pick would be beaten up the floats of weft would be pushed up toward the cutting part a of the knife and at the time when the reed g would be pressing the pick of the weft closely up to the last preceding pick, the knife-bar c, 0 would be pushed toward the reed by aquick short movement, as described in the specification of my said former invention, the floats of weft being severed at the time when the pick would be tightly held and supported by the reed. Forthe ground picks, all the knives would be lifted to the upper position, so that the shuttle would pass below all the knives. This is the case with reference to the example illustrated, but it must be understood that I may arrange for all the knives to be kept in the higher position when not inuse, knives which are to cut the floats of any pile pick of weft, being in that case lowered for such pick.

When weaving heavy fabrics, the knives made of one piece of thin sheet metal, as in the case of Fig. 1, would be too weak, and if made strong enough the edge at a. would be too thick to act as a cutter, without sharpening. To obviate this difliculty I adopt such a formation as indicated by Fig. 4. In this example the parts a a and a are of two thicknesses, so that the part a* constitutes a sheath to hold a knife blade a cut of thin sheet steel. The parts a a* and the remainder corresponding to parts a a may be made by cutting out a blank of suitable form and bending it up along the center line, so as to make it double from end to end or the sheath part a a maybe made of two thicknesses of sheet metal soldered, or brazed to a wire takmg the place of a, as indicated in the end view Fig. 11. The methodwherebyl impart the said movement to the knife-bar is indicated in Fig. 8, wherein it represents the loom crank shaft, and i the breast beam of the loom, these parts being represented in section. To the inside of the breast beam are secured brackets in which are formed bearings for a rock shaft 70. Upon this shaft are fixed two upright levers, of which one appears at Z in the said Fig. 8. The levers are fixed near the two ends of the rock shaft, so as to clear the selvages of the fabric which is being woven. The upper end of each lever is connected by means of a link m with the knifebar which is supported upon slides, or carriers, attached to the loom framing.

Fig. 9 and 10 illustrate a suitable construction for supporting the ends of the knife-bar.

Each end of the bar is provided with two fingers n, n which rest upon the bottoms of recesses in asupporting bracket 0. The recesses in the bracket 0 are covered by a steel spring 19 which keeps the fingers u down in the recesses, and at the same time permits the fingers to slide therein when the knife bar is moved toward the reed. The spring 1) yields to give the knife-bar a little restrained freedom of upward and downward movement. Upon the rock-shaft 7c is fixed a lever g which is connected by a link a with a lever s which is mounted upon a fulcrum stud 4) which is carried by the loom framing. Upon the crank-shaft h is fixed a tappet or wiper t which once in each revolution of the shaft acts upon a bowl .9 carried by the lever s. A spring .9 keeps the bowl in contact with the tappet which is formed to give the bowl a quick push, and is adjusted upon its shaft to give such push at the time of beating up. This push is transmitted to the lever q and by the levers Z, and links m to the knife-bar.

For convenience of description, and to avoid repetition, I have used the term knife to designate the whole of the device represented in Fig. 1, from a to a although properly speaking the part a is the knife, the part a the head, the part a the wire, which passes through the reed, and the part a the tail or rear end for connection with the loom harness.

I claim as my invention-- 1. The herein described knife for cutting weft pile fabrics in the loom, the said knife having at one end a rounded part for attachment to a bar common to the set of knives, a dished washer attached to this rounded end and a cutting part adjacent to the latter while the opposite end is adapted for attachment to the loom harness, substantially as set forth.

2. In a loom for Weaving cut pile fabrics, the combinationof a knife-carrying bar, with a cutting knife having a rounded end adapted to fit in a groove in the carrying bar, and having a cutting edge near the said end, and a hinging piece I), carried by the loom harness to which the other end of the knife is hinged, all substantially as and for the purposes set forth.

3. The herein described knife for cutting weft pile fabrics in the loom, said knife having at one end a rounded part for attachment to a carrying bar and perforated at the other end to afford a hinge connection with the harness, with a cutting part adjacent to the said rounded part.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GUSTAVUS ADOLIHUS JOHN SOIIOTT.

\Vitnesses:

EDWARD K. DUTTON, JOSHUA ENTVVISLE. 

